Export utils from @schematics/angular

From @alan-agius4 on March 16, 2018 17:12

Bug Report or Feature Request (mark with an x)

- [ ] bug report -> please search issues before submitting
- [X] feature request

Area

- [] devkit
- [x] schematics

Desired functionality

At the moment none of the @schematics/angular utils and actual schematics are exported available if one needs to create a custom schematic using an existing util, or build on top of an existing schematic.

1. It would be nice that at least some utils are exported such as the ast utils, find-module etc… While I understand that these might not make sense to be in @angular-devkit/core, I think it will be good to export them and make them available. Either in the schematics package itself or create another package such as @angular-devkit/utils, @angular-devkit/ast-utils etc…

Another option would be to export them directly from the @schematics/angular package, using the main and typings field in package.json

I’ll happily do a PR if you let me know is the desired way.

Copied from original issue: angular/devkit#514

[Airblader]

Also for reference, somewhat related (but different): https://github.com/angular/angular/issues/29241 and https://github.com/angular/angular/pull/28343

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